I am in the process of configuring a Jenkins "Master Only" instance on a Windows Virtual Machine that will be used to build "Multi-Target Archives" for deployment to Neo. I am following the excellent blog CI Best Practices Guide – SAPUI5/SAP Fiori on SAP Cloud Platform as a reference. I want to get a standard scenario working before reverting to "Piper" pipelines.
I have created a simple "hello world" UI5 application to begin just to test the end to end connectivity, and trigger the "Multi Target Archive Builder", however the build fails when trying to run grunt.cmd (see below for log output) even though grunt.cmd is available in specified directory:
The build always:
1) retrieves application from Azure DevOps Git repository
2) Creates /src subfolder
3) Creates .npmrc
4) Triggers the "Multi Target Archive Builder"
5) But always fails when trying to trigger grunt.cmd with following error, even though grunt.cmd is available in the \node_modules\.bin referenced in the path

java.io.IOException: Cannot run program "grunt.cmd" (in directory "C:\Program Files (x86)\Jenkins\workspace\CI_SCPIV_HelloWorld_master_build\src\node_modules\.bin"): CreateProcess error=2, The system cannot find the file specified at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
The content of mta.yaml, gruntfile.js and package.json are as follows:



Windows PowerShell "Build Step" - nb hardcoded paths for now:
# create local npmrc file
cd $ENV:WORKSPACE/src New-Item -type file -name ".npmrc"
"registry=https://registry.npmjs.org/" | Out-File ".npmrc"
-encoding ascii "@sap:registry=https://npm.sap.com/" | Out-File ".npmrc"
-encoding ascii -Append
# execute MTA build
java -jar C:\SCPIV\MTABuilder\mta_archive_builder.jar --mtar=scpivui5hello.mtar --build-target=NEO build
Jenkins Log
SAP Multitarget Application Archive Builder 1.1.8 Module "scpivui5hello": invoking npm install Module "scpivui5hello": command output > audited 1428 packages in 8.751s > found 11 vulnerabilities (6 low, 5 moderate) > run `npm audit fix` to fix them, or `npm audit` for details Module "scpivui5hello": invoking grunt ERROR: An unexpected error has occurred; please tell us about it in our Community page: " https://answers.sap.com/tags/73554900100700001351" Build step 'Windows PowerShell' marked build as failure Archiving artifacts